It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.
| A．that; while | B．what; while | C．that; as | D．what; as |
. most parents care about is to provide the best education for their children.
| A．What | B．That | C．How | D．Whether |
The job required did it careful and brave enough.
| A．who; is | B．whom; was | C．whomever; were | D．whoever; be |
It is well known ___ a person eats causes changes in the body.
| A．what | B．that what | C．what that | D．that |
As is known to all, Yang Liwei has become a space hero is we have expected．
| A．that; which | B．what; that | C．what; which | D．that; what |
________ is known to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
| A．As; whom | B．What; whose | C．It; whose | D．What; whom |
_______ is even important is ______ as the earth cooled down, water began to appear on its surface.
| A．That, that | B．What, that | C．What, what | D．It, that |
It is_____the pupils do in their spare time_____ really______ them to take their place in society as citizens when they grow up.
| A．what; that; prepare | B．that; what; prepares |
| C．what; that; prepares | D．that; what; prepare |
________ you ought to do now is to see a doctor at once.
| A．How | B．That | C．Which | D．What |
_____ most of these languages are now threatened and may disappear is a serious matter to the people in Britain.
| A．The | B．Why | C．That | D．不填 |
Is _______ Qinghai-Tibet Railway plays an important role in China’s railway history the topic that you’re coming to?
| A．it | B．that | C．what | D．this |
It doesnt matter ________ you pay by cash or credit card in this store.
| A．how | B．whether | C．what | D．why |
_____ impressed me was the boy’s ability to deal with this kind of difficult physics problem.
| A．Which | B．What | C．It | D．That |
one of the girl players can beat LiNa in the following match in China isn’t clear.
| A．Whoever | B．Whatever | C．Whichever | D．Wherever |
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